minio/cmd/notify-nats.go
2016-09-29 23:42:10 -07:00

109 lines
2.7 KiB
Go

/*
* Minio Cloud Storage, (C) 2016 Minio, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package cmd
import (
"io/ioutil"
"github.com/Sirupsen/logrus"
"github.com/nats-io/nats"
)
// natsNotify - represents logrus compatible NATS hook.
// All fields represent NATS configuration details.
type natsNotify struct {
Enable bool `json:"enable"`
Address string `json:"address"`
Subject string `json:"subject"`
Username string `json:"username"`
Password string `json:"password"`
Token string `json:"token"`
Secure bool `json:"secure"`
PingInterval int64 `json:"pingInterval"`
}
type natsConn struct {
params natsNotify
*nats.Conn
}
// dialNATS - dials and returns an natsConn instance,
// for sending notifications. Returns error if nats logger
// is not enabled.
func dialNATS(natsL natsNotify) (natsConn, error) {
if !natsL.Enable {
return natsConn{}, errNotifyNotEnabled
}
// Configure and connect to NATS server
natsC := nats.DefaultOptions
natsC.Url = "nats://" + natsL.Address
natsC.User = natsL.Username
natsC.Password = natsL.Password
natsC.Token = natsL.Token
natsC.Secure = natsL.Secure
conn, err := natsC.Connect()
if err != nil {
return natsConn{}, err
}
return natsConn{Conn: conn, params: natsL}, nil
}
func newNATSNotify(accountID string) (*logrus.Logger, error) {
natsL := serverConfig.GetNATSNotifyByID(accountID)
// Connect to nats server.
natsC, err := dialNATS(natsL)
if err != nil {
return nil, err
}
natsLog := logrus.New()
// Disable writing to console.
natsLog.Out = ioutil.Discard
// Add a nats hook.
natsLog.Hooks.Add(natsC)
// Set default JSON formatter.
natsLog.Formatter = new(logrus.JSONFormatter)
// Successfully enabled all NATSs.
return natsLog, nil
}
// Fire is called when an event should be sent to the message broker
func (n natsConn) Fire(entry *logrus.Entry) error {
ch := n.Conn
body, err := entry.Reader()
if err != nil {
return err
}
err = ch.Publish(n.params.Subject, body.Bytes())
if err != nil {
return err
}
return nil
}
// Levels is available logging levels.
func (n natsConn) Levels() []logrus.Level {
return []logrus.Level{
logrus.InfoLevel,
}
}